Being able to call an Uber or Lyft when I need it has made it much easier to live without a vehicle. I have tried to call a cab company using the phone before, but even they have transitioned to using apps for dispatch now.
That said, there are manual workarounds to almost everything requiring a smartphone. They’re simply less efficient.
If I can conveniently print out a boarding pass either at home or at the airport I tend to do so. That way I'm not fiddling with my phone when I don't need to.
(I think I've seen it the other way around in London at least.)
I'm sorry, what? Outside the US I just show my boarding card prior to going through security. I'm pretty sure my ID doesn't get checked until I board the plane, so hearing that you show biometrics is a bit jarring.
I was in the US a few weeks ago, but I can't remember if I had to show ID when going through security on leaving. I tend to work on autopilot when navigating airports.